Traction oil-immersed bushing is the only channel for connecting the high-speed railway system with the external power grid, and its transient hot spot is one of the most important factors reflecting its operation status. Since the traction load of a high-speed railway has obvious impulse characteristics, the existing calculation method for bushing given in IEEE Std C57.19-100-2012 is incompatible, because it is designed for steady electrical loads. Thus, in this article, the equivalent hot-spot temperature rise of the bushing under varying traction loads is calculated by the traction parameters (i.e., operating time $T_{\mathrm {ot}}$ , interval time $T_{\mathrm {it}}$ , and per unit transient traction current $I_{\mathrm {\text {tc}}}$ ). Then, the difference value of transient hot-spot temperature rise is modified by analyzing the change of transient hot-spot temperature rise under varying traction loads. Finally, a calculation method is proposed for the transient hot-spot temperature rise of the oil-immersed bushing in high-speed railway under different traction loads. A case study of a 110-kV oil-immersed bushing shows that the proposed method is speedy and accurate.


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    Title :

    Calculation Method for the Transient Hot-Spot Temperature Rise of Oil-Immersed Bushing in High-Speed Railway


    Contributors:
    Zhang, Jun (author) / Zhou, Lijun (author) / Yun, Xiucheng (author) / Cai, Yuhong (author) / Fan, Cewen (author) / Wang, Dongyang (author) / Zhang, Yang (author)


    Publication date :

    2024-03-01


    Size :

    1563944 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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